JP5008318B2 - Non-rotating quick connector - Google Patents

Description

Detailed Description of the Invention
[Background of the invention]
This application claims the benefit of US Provisional Application No. 60 / 657,996, filed Mar. 1, 2005. The present invention relates to a quick connector for releasably securing a metal tube in a fluid system. It particularly relates to a quick connector that resists rotation of the connected tube.

  Quick connectors are used to assemble rigid fluid paths or tubes to mating parts such as flexible hoses or fluid systems. The quick connector assembly comprises some form of body or housing that defines an open outlet with a cylindrical inner surface of various diameters that interacts with the inserted tube.

  The tube has a free end portion that fits into the connector body insert. A retainer removably couples the remaining two components.

  All quick connector end forms allow the tube to rotate relative to the body of the quick connector. This relative rotational movement may not be desirable in certain applications. Non-rotating tubes can maintain a more robust fluid and vapor (permeation) seal.

  In one form, the present invention provides an endform having a planar portion on the free end portion of the tube and an interactive planar portion within the inner bore of the connector body or housing, the planar portions interacting. Minimize relative rotational movement.

  The planar portion of the end foam can be positioned anywhere on the end foam other than the O-ring seal position. In order for the sealing surface to interact with the O-ring, the surface must be cylindrical.

  Another type of quick connector uses a locking member that extends perpendicular to the body. It is inserted behind the tube upset.

  In such a connector assembly, the planar portion is positioned such that the quick connect retainer in fully engaged condition restrains the end form upset. The leg portion of the locking member is connected to the flat surface portion to reduce relative rotational movement of the end form with respect to the quick connect main body.

  Another option is to provide a flat part on the end form so that the confirmation mechanism or auxiliary latch applies an additional clamping force to the flat part, thereby increasing the amount of torque required to cause relative rotational movement. Yes.

  The tube in this type of quick connector assembly has flat portions on either side of the tube at a location adjacent to the annular radial surface on the tube upset. The retainer's locking arm contacts the flat surface, thereby resisting rotation. An auxiliary latch may be used to prevent the lock arm from expanding when a rotational force is applied to the tube.

  Conventional structures for detents have additional parts such as a clip that snaps onto the quick connect body and a first bend that is closest to the end form portion of the tube. The flat rotation prevention mechanism on the tube and quick connect body will eliminate the part and labor costs of a separate clip assembly.

  The flat part on the nose of the end form solves another problem. Many brake components, such as the hydraulic control unit (HCU), anti-lock brake system (ABS), and master cylinder, have up to four fluid ports in close proximity to each other on the same plane. Conventional structures for eliminating tube crossings include machining screws of different diameters inside the brake tube nut and receiving bore. Changing the thread diameter for each port is costly because it makes tooling special, adds material for larger thread diameters, increases machining time, and reduces brake pipe nut batch size It is.

  Many combinations are possible based on the angle of orientation of the planar part by machining or shaping the planar part inside the fluid pipe bore pocket of the body to align with the planar part of the associated tube endform become. This approach can be used to ensure that the tube end form is assembled to the proper receiving port. For example, four different connection combinations can be achieved by rotating the planar portion 90 degrees clockwise or counterclockwise.

  This approach also takes into account the combination of several flat sections to achieve the same anti-rotation and assembly guarantee. This relates to the overall surface area of the dimensions and shape of the planar part for the function of the detent, or any combination of planar parts along the tube. Since the tube is inherently rigid and withstands large torsional movements, the orientation of the flats may not allow an assembly operator to connect in a receiving port that does not have a matching flat. It is possible to increase the number of connections with these mechanisms as long as the effective tube twist is less than the angular difference between the planar portions of the receiving port. The clip can also increase the resistance to twisting of the tube, thereby increasing the number of ports that can be assembled without combining the tube with the wrong port.

[Embodiment]
FIG. 1 illustrates a quick connector coupling assembly, generally designated 20, that embodies the principles of the present invention. It has a fluid tube 22 and a body or housing 24. A retainer 26 removably connects between the fluid system tube 22 and the body 24. The body 24 is shown connected to a flexible hose 47 that is representative of connections to the rest of the fluid system. This connector coupling is generally similar to the quick connector disclosed in US Pat. No. 5,161,832, the disclosure of which is hereby incorporated by reference.

  The present invention is suitable for use in many quick connector coupling devices. U.S. Pat. Nos. 5,257,833, 5,324,082, 5,395,140, 5,449,848, 5,628,531 and 6,086,118 Figure 2 is an example of a quick connector coupling suitable for use with the present invention. It is contemplated that the present invention can be used with many other known quick connector coupling devices as well.

  The tube 22 is a rigid metal tube. It comprises a radial upset 33 defining an annular radial locking surface 34, a cylindrical sealing surface 25, a substantially flat engagement plane 27, and an end foam region 23 having a tip or free end 29. A substantially flat engagement plane 27 extends from the tip or free end 29 toward the upset 33, but not the entire distance. The cylindrical sealing surface 25 is located between the upset 33 and the axial end of the flat surface 27.

  The illustrated connector body or housing 24 is hollow and made of molded plastic. Other materials are also commonly used. The body 24 defines an internal cavity or passage having an inlet opening 28 and four cylindrical surfaces of different diameters each extending inwardly from the inlet opening 28. These are a relatively large retainer surface 30, a relatively small cylindrical sealing surface 32, a tube end receiving surface 35, and a channel 36 that completes the passage through the body.

  The retainer surface 30 receives the lock retainer 26. It defines an annular radial locking surface 37.

  The sealing surface 32 is somewhat smaller in diameter than the retainer surface 30. It is larger in diameter than the cylindrical sealing surface 25 of the tube end foam region 23. An O-ring 46 seals between these surfaces, thereby providing a fluid tight seal.

  The tube end receiving surface 35 is sized close to the outer diameter of the cylindrical sealing surface 25 of the end foam region 23. It receives and guides the cylindrical sealing surface 25 when the end-form region 23 of the tube is placed in the body cavity.

  The tube end receiving surface 35 is not completely cylindrical. It includes a generally flat detent or locking plane 48 that extends axially toward the cylindrical seal surface 25 and terminates at a transition between the cylindrical tube receiving surface 35 and the cylindrical seal surface 32. Is provided. It does not extend into the region of the cylindrical sealing surface 32.

  The retainer 26 is cylindrical and has a front ring 36 and a rear flexible ring 38. A plurality of lock arms 39 extend from the flexible ring 38. Each arm has a tube contact surface 40 and a body contact surface 41. When the end form region 23 of the tube 22 is positioned completely within the cavity of the body 24, the tube contact surface 40 of each arm contacts the radial locking surface 34 of the upset 33 and the body contact surface 41 of each arm 39. Contacts the annular radial locking surface 37. The tube 22 is held in the body or housing 24 by the intervention of the lock arm.

  To complete the liquid tight joint between the tube 22 and the body 24, the tube end-form region 23 is inserted into the opening 28. As the tube end foam region is moved inward, the upset 33 can deflect the lock arm 39 radially outward, thereby allowing the tube end foam region to advance into the cavity of the body 24. An O-ring 46 and associated components are present on the cylindrical sealing surface 25 of the end foam region 23 and move into place when the tube 22 is inserted.

  In accordance with the present invention, the tube 22 is inserted while aligning the generally flat engagement plane 27 with the otherwise generally flat locking plane 48 formed on the cylindrical tube end receiving surface 35, thereby The substantially flat engaging plane 22 and the substantially flat locking plane 48 of the tube are arranged in a face-to-face relationship. The tube can only be fully inserted into the cavity of the body 24 if there is such an orientation between the end foam region 23 and the tube end receiving surface 35. Further, after full insertion, the flat plane 27 of the tube endform region 23 interacts (cooperates) with the otherwise flat plane 48 on the cylindrical tube receiving surface 35, thereby allowing the body 24 to Rotating movement of the tube 22 relative to is prevented.

  The above embodiment is a flat engagement plane 27 defined in the end form region 23 of the tube 22 and interacts with a corresponding flat locking plane 48 defined on the body 24, thereby allowing the body 24 to Although a flat engagement plane 27 is disclosed that prevents rotational movement of the tube 22 relative to the surface, the present invention is a surface defined on the end form and the body, wherein the interaction causes rotational movement of the tube relative to the body. Note that the shape of the preventing surface is not limited to a “flat plane”. Rather, any shape of the engagement surface defined on the end form of the tube that can interact with the locking surface defined on the body, thereby preventing rotational movement of the tube relative to the body is provided by the present invention. Included in the spiritual scope.

  Another feature of the quick connector assembly 20 of the present invention is that after the quick connector assembly is assembled, the quick connector assembly 20 is fully assembled by a leak test typically performed by an original equipment manufacturer (OEM). It can be ensured that the tube contact surface 40 of the arm 39 is in abutting relation with the radial locking surface 34 of the upset 33. As shown in FIG. 4, the flat plane 27 defined on the endform region 23 is L in length. The length L of the flat plane 27 is such that the O-ring 46 is not located radially outward of the flat plane 27 when the quick connector assembly 20 is fully assembled as shown in FIG. The dimensions must be Rather, when the quick connector assembly 20 is fully assembled, the O-ring 46 is located just radially outward of the cylindrical sealing surface 25. FIG. 6 shows that the quick connector assembly 20 of the present invention is incompletely assembled so that the end foam region 23 is fully inserted into the cavity body 24 until its upset 33 can ride over the arm 39 of the retainer 26. Indicates a situation that has not been done. When the quick connector assembly is incompletely assembled, the O-ring is located just radially outward of the flat plane 27. The flat plane 27 is drawn radially inward from the cylindrical seal surface 25 where the O-ring 46 should rest if the quick connector assembly 20 is fully assembled. A space or flow path 31 is defined between the flat form 27 of the end form region 23 and the end form region 23. If the quick connector assembly 20 is incompletely assembled, this flow path 31 will cause fluid leakage.

  FIG. 7 illustrates another important feature of the present invention. A fluid system component, generally designated 224, such as a brake system component or body is shown. It can be an antilock brake system component, a master cylinder, or a hydraulic control center. It could be a component of any other fluid system that connects a number of rigid tubes to a single body.

  The body 224 has four cavities, bores or ports 252, 254, 256 and 258. Each cavity is a tube receiving outlet such as the internal cavity of the body 24 of FIGS. Each slot has four cylindrical surfaces with different diameters. The innermost one is a channel 237, such as the channel of the embodiment of FIGS. Each leads to a branch of the fluid system whose body 224 is a port. The next inner bore is a tube end receiving surface 235, such as the tube end receiving surface 35 of the body 24 of FIGS. The cylindrical seal surface corresponds to the seal receiving surface 32 of the first embodiment, and the large retainer receiving surface is identical to the retainer receiving surface 30 of the embodiment of FIGS. Since the body 224 is shown in cross section through the cylindrical tube receiving surface 235, these latter two cylindrical surfaces are not shown.

  Each tube receiving surface 235 has a substantially flat locking plane 248. Each flat locking plane 248 is located at a different location around its associated cylindrical tube receiving surface 235. Within port 252, the flat locking plane 248 is vertical on the left side of the port. Within the port 254, the flat locking plane 248 is horizontal at the bottom of the port. Within port 256, the flat locking plane 248 is horizontal at the top of the port, and within port 258, the flat locking plane is vertical on the right side of the port.

  Each port is for interaction with a tube, such as tube 22 of FIG. Thus, four individual tubes are connected to the component or body 224. The tubes associated with the multiport component 224 are oriented so that they can be inserted into only one port.

  The tube bundle shown in FIG. 8 represents this relationship. Four tubes, tubes 262, 264, 266, and 268, are shown, each having an end form region generally designated 223. The tubes are secured together by clips 270. Each endform region has an upset 233 for locking within one of the ports 252, 254, 256 and 258. Each endform region has a flat engagement plane 227 that is oriented to align with the flat plane 248 of the associated port. When assembled, tube 262 can only be inserted into port 252, tube 264 can only be inserted into port 254, tube 266 can only be inserted into port 256, and tube 268 can only be inserted into port 258.

  In the illustrated embodiment, the flat locking plane 248 interacts with a flat engagement surface formed on the tube. However, these alignment elements need not be flat as disclosed. For example, the tube receiving cylindrical surface 235 can be formed as a complete cylinder. In that case, a pin or other element can be inserted that crosses the bore at a suitable location. The tube can then be inserted only when the flat plane 227 is aligned with the position of the pin or other insertion element. It should also be noted that in connection with the embodiment of FIGS. 1-6, a flat plane 48 associated with the body 24 need not be molded into the cylindrical tube receiving surface 35. The surface could be formed as a cylinder. An anti-rotation mechanism can be provided by an insert that is non-rotatable with respect to the body 24 and that overlaps in place on the cylindrical tube receiving surface 35.

  Rather than defining a flat locking plane 48 directly in the body 224 or defining a flat locking plane 248 in the body 224 as shown in the above embodiment, it is shown in FIGS. A locking surface 448 can also be defined in the insert 414 as described above. The insert 414 has eight protrusions 416 extending radially at substantially equal intervals. As shown in FIGS. 10 and 11, an alternative quick connector assembly 420 of the present invention has an end foam region 23, a retainer 26, a body 424 and an insert 414. The body or housing 424 defines eight notches 417 at approximately equal intervals. Insert 414 is inserted into body 424 with protrusion 416 aligned with notch 417. After the insert 414 is fully inserted into the body 424, the protrusion 416 of the insert 414 interacts with the notch 417 of the body 424, thereby resisting rotational movement of the insert 414 relative to the body 424. The insert 414 is hollow and defines a tube receiving surface 435. The tube receiving surface 435 has a flat locking plane 448. As with the quick connector fitting assembly 20, the flat engagement plane 27 of the tube end-form region 23 interacts with the flat locking plane 448, thereby preventing rotational movement of the tube relative to the body 424.

  One advantage of defining a locking surface, such as a flat locking plane 448 on the insert 414, rather than defining the locking surface directly on the body or housing, is the various shapes of the locking surface associated with the body. Can be used in combination with a common body or housing 424. As previously mentioned, the engagement surface defined on the endform region 23 and the locking surface defined on the body need not be “flat planar” shapes. Thus, when using different shapes for the engagement surfaces defined on the endform region 23, different shapes are required for the locking surface associated with the body in order for the two surfaces to interact. is there. By using the insert according to the present invention, a common body 424 can be used even when the engagement surfaces defined on the end foam region have various shapes. An insert having the same profile including the protrusion 416 can be formed with the desired internal shape required to interact with the tube end form.

  A body or housing 524 having four cavities 552, 554, 556 and 558 is shown in FIG. Body 524 is similar to body 224 except that a flat locking plane 448 associated with body 524 is defined on insert 414 rather than on body 524. Each cavity 552, 554, 556 and 558 has eight equally spaced notches 517. Insert 414 is inserted into each of cavities 552, 554, 556, and 558 with protrusions 416 aligned with notches 517 in corresponding cavities 552, 554, 556, and 558. After the insert 414 is fully inserted into the corresponding cavities 552, 554, 556, and 558, the protrusion 416 of the insert 414 interacts with the corresponding notch 517, thereby resisting rotational movement of the insert 414 relative to the body 524. To do. Since a flat locking plane 448 associated with the body 524 is defined on the insert 414, the body 524 defining four common shaped cavities 552, 554, 556, 558 and four inserted into the cavities. While using the same insert 414, the four flat locking surfaces 448 associated with the body 524 are oriented to align with the flat engagement plane 227 of the corresponding endform shown in FIG. Can do. Such construction of the quick connector assembly greatly changes the complexity required to accommodate the various orientations of the flat engagement plane of the end foam by simply changing the orientation of each insert inserted into the body cavity. To reduce.

  A further embodiment of the present invention is shown in FIGS. The quick connector coupling assembly 110 shown in FIG. 13 uses a lateral retainer member that is applied to the outside of the body to secure the tube within the connector body. Because it is approximately “U” shaped, it is often referred to as “horse-shaped” or “hairpin”. To incorporate the present invention, the tube of the assembly shown in FIG. 13 has been modified.

  The connector assembly of FIG. 13 is similar to the connector disclosed in US Pat. No. 5,586,792, the disclosure of which is incorporated herein by reference. It is contemplated that other “horsebed” connectors are suitable for incorporating the present invention. Such other connectors include connector fittings with lateral generally “U” shaped retainers applied to the outside. Examples include US Pat. No. 5,863,077 and pending US patent application Ser. No. 10 / 104,405, published on Sep. 25, 2003, with publication number US2003 / 0178844A1.

  The quick connector coupling assembly, generally designated 110, includes a body or housing 124, a tube 130, and a retainer 150. The body 124 defines an internal cavity defined by a cylindrical surface, similar to the body 24 of FIGS. The cavity is a hollow passage that extends from the tube receiving opening 128 to a channel in the shaft end 151. The shaft end 151 is connected to a fluid system hose (not shown).

  Both sides of the body 124 are provided with holes 80 that open into the internal cavity and thereby expose the outer surface of the tube 130 inserted through the inlet opening 128. Lateral ridges 72 and 88 are formed on the outer surface of the body 124. Webs 77 and 79, shown with parallel surfaces in FIGS. 13 and 17, extend between ridges 72 and 88 and overlie hole 80.

  The tube 130 has an end form portion 123 with a free end or tip 129 and a radial upset 133 spaced from the tip. The upset defines an annular radial locking surface 134. End form portion 123 has a cylindrical sealing surface 125. In this embodiment, a pair of flat engagement planes 127 are provided on either side of the tube 130 at a location adjacent to the radial locking surface 134 on the upset 133. These planar portions are best shown in FIGS. 13, 14 and 17. The flat portion is adapted to be positioned parallel to the inner surfaces of the webs 77 and 79.

  The retainer 150 is generally “U” shaped. It is molded from plastic. It is rigid but has some flexibility. The retainer 154 has a pair of elongated, generally parallel lock beams 152 joined by a cross member 154 at one end. The retainer defines a lateral flat plane 156. The beam has parallel outer flat surfaces 153 and flat opposed locking surfaces 155 that are spaced approximately the same distance from the flat portion 127 on the outer diameter of the tube 130.

  The lock beam is dimensioned to fit into the hole 80 on each side of the body 124. As best shown in FIG. 13, the flat surface is configured to abut the ridge 72 of the body 124 when the retainer 150 is fully inserted. There is some clearance between the outer surface 153 of the beam and the webs 77 and 79 of the body 124.

  As shown in FIG. 15, the lock beam has a shaped lead area 164 that faces the opening 128 of the body 124. These regions engage the free end or tip 129 when the tube 130 is inserted. The cross member 154 bends, thereby causing the beam 153 to move away and allow the upset 133 to move beyond the beam. This positions the beam between the annular radial locking surface 134 of the upset 133 of the tube 130 and the lateral ridge 72 of the body 128. Ridge 72 contacts a flat surface 156 on retainer 150, thereby preventing axial movement of the retainer.

  In accordance with the present invention, when the tube 130 is fully inserted into the body 124, the opposing flat locking surface 155 of the beam 152 contacts the flat engagement plane 127 on the tube 130. This interaction resists rotational movement of the tube 130 relative to the body 124.

  As best seen in FIG. 17, the anti-rotation resistance of the quick connector coupling 110 is greatly increased by adding an auxiliary (second) latch member 200. The latch member is generally “U” shaped and has a leg 202 connected at one end by a crossbar 204, and after connecting the tube 130 to the body 124, the leg 202 is positioned in the radial direction of the beam 152. Insert into hole 80 on the outside. The legs 202 are sized to fill the space between the outer surface of the lock beam 152 and the webs 77 and 79 on the body 124. When so positioned, the lock beam 152 is prevented from deflecting outwardly in the hole 80 toward the webs 77 and 79. This ensures that the flat inner locking surface 155 of the beam 152 and the flat engagement plane 127 on the tube 110 are in contact. It can effectively withstand the force of pressing the lock beam 152 outward due to the rotational torque applied to the tube 130.

  The connector joint structure shown in FIGS. 13-17 is used in the quick connector joint disclosed in pending US patent application Ser. No. 10 / 814,314 filed Mar. 31, 2004. It is considered suitable for The specification and drawings of that application are incorporated herein by reference.

  FIG. 18 of the present application is a perspective view of such a structure used in combination with a tube 330 such as tube 130 of FIG. 13 and a connector body 324. 19 and 20 show a cross-sectional view through the connector fitting at the position of the retainer disposed between the tube upset 333 and the inlet opening 328 of the body 324. The tube 330 has flat engagement planes 327 on either side of the tube, as in the embodiment of FIG.

  The retainer 350 used in the joint assembly of FIG. 18 is generally “U” shaped. It has a locking beam 352 provided with a flat opposed locking surface 355, such as the flat opposed locking surface 155 of the retainer of the embodiment of FIGS. When the beam 352 of the retainer 350 is inserted into the hole 380 on each side of the connector body 324, the flat opposing locking plane 355 on the beam 352 contacts the flat engagement planes 327 on both sides of the tube 330. These opposing flat surfaces interact thereby resetting the rotation of the tube.

  A “U” shaped auxiliary latch member 300 having legs 302 is inserted into opening 380 from the opposite end. The legs overlap the lock beam 352, thereby preventing outward movement of the beam 352 relative to the tube 330. This construction maximizes the resistance to stopping the rotation of the tube 330 relative to the body 324.

  With reference to the specification and drawings of US patent application Ser. No. 10 / 814,314, and using the reference numbers used therein, the tube 14 is upset on the side of the upset 90 remote from the end 92. There may be planar portions on either side of the tube at adjacent locations. There will be an opposed parallel plane on the inner surface of the leg 96 that interacts with a flat plane on the tube 19. This interaction resists tube rotation relative to the body 12. When the auxiliary latch 18 is inserted onto the main body 12, the legs 96 cannot bend away from the tube 19. This provides maximum resistance to tube rotation.

  Various features of the present invention have been described with reference to the above exemplary embodiments. It should be understood that modifications can be made without departing from the spirit and scope of the invention as expressed by the appended claims.

1 is a cross-sectional view of a quick connect joint assembly embodying the principles of the present invention. 2 is a perspective view of a tube for the quick connector assembly of FIG. 1 having an end form embodying the principles of the present invention. FIG. FIG. 3 is a front view of the tube of FIG. 2. FIG. 3 is a side view of the tube of FIG. 2. FIG. 2 is a cross-sectional view of the quick connect joint assembly of FIG. 1 through the flat portion of the tube. FIG. 2 is a cross-sectional view of the quick connect joint assembly of FIG. 1 with a tube incompletely inserted into the body. 1 is a cross-sectional view of a fluid system component having multiple ports for receiving multiple tubes embodying the principles of the present invention. It is a front view of the tube bundle assembled | attached to the multiple port component of FIG. FIG. 6 is a perspective view of an insert used in an alternative quick connector coupling assembly embodying features of the present invention. FIG. 10 is a cross-sectional view of an alternative quick connector coupling assembly using the insert of FIG. 9. FIG. 11 is a cross-sectional view of the alternative quick connector coupling of FIG. 10 generally along line 11-11 of FIG. FIG. 10 is a cross-sectional view of an alternative fluid system component having multiple ports for receiving multiple tubes embodying the principles of the present invention using an insert as shown in FIG. FIG. 6 is a side view of an alternative form of quick connect joint assembly embodying features of the present invention. It is a perspective view of the male pipe member of the quick connector coupling assembly of FIG. 13 explaining the principle of the present invention. It is a figure which shows the retainer of the quick connect coupling of embodiment of FIG. 13 explaining the principle of this invention. It is a figure which shows the retainer of the quick connect coupling of embodiment of FIG. 13 explaining the principle of this invention. FIG. 18 is a cross-sectional view of the quick connector coupling of FIG. 13 taken generally along line 17-17 of FIG. FIG. 6 is a perspective view of another type of quick connector coupling assembly using an outwardly applied retainer illustrating the principles of the present invention. FIG. 19 is a cross-sectional view of the quick connector joint of FIG. 18. FIG. 19 is a cross-sectional view of the quick connector joint of FIG. 18.

Claims (7)

A body defining an internal passage extending from the inlet opening;
A tube having a radial upset extending through the inlet opening to a free end disposed in the internal passage and spaced from the free end; and an engagement surface;
A retainer for securing the tube within the body within the body;
A hollow insert disposed within the main body and fixed so as not to rotate with respect to the main body,
The quick connector coupling assembly wherein the insert has a tube receiving surface surrounding the tube and a locking surface that engages the engagement surface of the tube to prevent rotation of the tube relative to the body. . The insert includes at least one protrusion extending radially outward; the body includes at least one notch;
  At least one protrusion extending radially outward of the insert and at least one notch of the body cooperate to resist rotational movement of the insert relative to the body against the body. The quick connector coupling assembly according to claim 1, wherein rotation is disabled. The quick connector coupling assembly of claim 2, wherein the insert includes a plurality of protrusions extending radially outward and the body includes a plurality of notches. The said pipe | tube is provided with the cylindrical sealing surface, the said main body is provided with the sealing surface, The O-ring is further provided between the cylindrical sealing surface of the said pipe | tube, and the sealing surface of the said main body, The Claim 1 thru | or 3 A quick connector coupling assembly according to any one of the preceding claims. The engaging surface of the tube is a substantially flat surface in the axial direction, the locking surface of the insert is a substantially flat surface in the axial direction, and the flat engaging surface of the tube and the flat surface of the insert The quick connector coupling assembly according to any one of claims 1 to 4, wherein the locking surface is arranged so as to face the locking surface. The internal passage of the body defines a retainer surface adjacent to the inlet opening, a cylindrical seal surface adjacent to the retainer surface and an insert receiving surface adjacent to the cylindrical seal surface;
  The insert is disposed on the insert receiving surface of the internal passage of the body, the insert defining a tube end receiving surface;
  The tube includes the engagement surface extending from the free end toward the upset, and the tube engagement surface and the insert locking surface interact to rotate the tube relative to the body. 6. A quick connector coupling assembly according to any one of the preceding claims, wherein a free end of the tube is disposed on the tube end receiving surface of the insert to resist. The quick connector coupling assembly of claim 6, wherein the tube has a cylindrical sealing surface defined, and further includes an O-ring disposed between the cylindrical sealing surface of the tube and the cylindrical sealing surface of the body.

Images